Back in 1998, after Shannon dumped Barney for Greg, Barney decided to enter the corporate world, but with ulterior motives. He finds and asks Greg for a corporate job at AltruCell Corporation, and is given the 'please' task, an acromyn for Provide Legal Exculpation And Sign Everything. The task legally implicated Barney in all corporate mishaps and schemes. The main motivation (besides morality) behind his employment record was to track Greg down, gain his trust, then destroy him for stealing Shannon from him. Barney entered the corporate world under Greg's tutelage while secretly working as an informant for the FBI so he could implicate Greg over the years for the company's wrongdoings and have him jailed.